Atari 800XL Field Service Manual

Cf
ouryj
*n
RDY Input
MJT
Phjs*
1 OocV
h
Initirvjpr R«^uc5T
tS9
NC
Non
Mjsfcibic Input
^:=J
N.a
.)V POWER
^
Af^dfc-u
SuS
A#
Address Bus
Al
Acfdrco
Bus
AS
AddrriS
Bus
AJ
Addrcw Bus
A*
Addrru Bus
AS
AddrfU Bus
*4
AddrrtJ
Bus
Jtf
Address Bus
A<
Addrc^ Bus
A#
4
Addre^ Bus
All
Address Bus
AU
—
n
3
A£S Rr9«t
t9
3
H
P^aie ?
Clock
«
1
3
i»
Set
Overflow
«'
3
H«*
PT^A
%c Clock
*
,
3
*v»
R^ad
Wrnc
If
3
==^
'
HALT
Input
1*
3
N-O
3
m
Djiia
Bui
11
3
-
Catx But
FIED) »
3-
|^^V^
Data Bus
-
3
l«
DaU Bus
=»
3
»
DatA Bui
^
3
-
Data But
sy
3
Di
Data Bui
m
3
or
Data
Bui
a
3
JOS Address
Bui
»
3
«»
Address Bus
9
3
MS Address Bui
a
3
AO
Address
Bui
a
3
^
Ground
Figu-e 1-3-
6502C
CPU Pin
Assignments
Alphanumeric Television Interface
ControHer
(ANTIC)
The ANTIC Display Processor is a
cmtofn display
microprorr-wc
with an
instruction
set customized for grapliics
gcT>eration, It
also
has
the
ability to
control the
ADDRESS & DATA bus and RAM
Refresh-
Figure M
is an illustration of the
ANTIC
Display
Processor
pin
assignrrw-nts-
8 00 XL Computer
Field
Service Manual
1-5

Atari 800XL Specifications

General

Manufacturer	Atari
Type	Home computer
Release year	1983
CPU	MOS Technology 6502C
RAM	64 KB
ROM	24 KB
Operating System	Atari OS
CPU Speed	1.79 MHz (NTSC) / 1.77 MHz (PAL)
Graphics	ANTIC and GTIA chips
Display resolution	160×192 to 320×192 pixels
Sound	POKEY chip
Storage	Cassette tape, floppy disk
Ports	Serial, parallel, monitor, joystick ports